Overview
Replace the worn or broken stock rear lower arms on your Arrma 1/18 Grom with the Hot Racing Aluminum Rear Lower Arm Set B (Narrow). CNC-machined from aluminum and finished in clean black anodizing, these direct-replacement narrow rear lower arms deliver significantly improved rigidity, durability, and bashing resistance over the factory plastic ARA330840 arms.
Whether you've snapped your stock arms in a hard landing, you're rebuilding for race-day reliability, or you simply want the look and feel of a serious metal-armed Grom build, this left/right pair is the easy bolt-on upgrade. Strong, precise, and ready to take on whatever you throw at it.
Key Features
- CNC-machined aluminum, black anodized finish
- Direct replacement for Arrma ARA330840 plastic rear arms
- Two narrow rear lower aluminum suspension arms (left & right)
- Stronger and more rigid than factory plastic
- Precision-made for clean bolt-on installation
Performance Benefits
- Eliminates arm flex that affects suspension geometry
- Survives crashes that destroy stock plastic arms
- Cleaner suspension travel and pivot action
- Better long-term suspension consistency
Usage Notes
Installation requires removal of the original ARA330840 plastic arms and direct replacement with the new aluminum set. Apply removable thread-locker on screws threading into aluminum components. Inspect pivot pins and bushings during installation; replace any worn parts at the same time for a complete rear-suspension refresh.
Technical Specs
- Material: CNC-machined aluminum
- Finish: Anodized black
- Configuration: Narrow rear lower arms (left + right)
- Replaces: Arrma ARA330840 rear lower arms
What's Included
- Two (2) narrow rear lower aluminum suspension arms (left & right)
Fitment
- Arrma Grom 1/18 (narrow rear suspension variants)
- Vehicles using Arrma ARA330840 rear lower arms
Summary
The Hot Racing Aluminum Rear Lower Arm Set B (Narrow) is a tough, drop-in upgrade that solves the stock plastic arm's biggest weakness. Bolt them on, drive harder, and break less — exactly what your Arrma Grom deserves.
